(22R,23R)-22,23-isopropylidenedioxy-6-oxo-24-nor-5α-cholest-2-ene

(22R,23R)-22,23-isopropylidenedioxy-3β-methanesulphonyloxy-24-nor-5α-cholestan-6-one

26,27-bisnorcastasterone

(2R,3S,5S,8S,9S,10R,13S,14S,17R)-2,3-Dihydroxy-17-[(S)-1-((4R,5R)-5-isopropyl-2,2-dimethyl-[1,3]dioxolan-4-yl)-ethyl]-10,13-dimethyl-hexadecahydro-cyclopenta[a]phenanthren-6-one

(22R,23R)-22,23-isopropylidenedioxy-3β-methanesulphonyloxy-24-norcholest-5-ene